Furnace-door.



B. GRANT & C. E. SLOMKE.

FURNACE DOOR. APPLICATION FILED DBO.19. 1910.

Patented Mar.11,1913.

:emr GRANT-.AND-CHARLES ERNEST sLoMKE, or BoIssnvAIN, 'MANIToBA,.'cANAnA.

rURNAcE-Doon.

noaaesa.

Specification of Letters Patent.

Patented Mar. 11, 1913.

Applicationled December 19, 1910. Serial No. 598,187.

-gandlconstruotion of parts'hereinafter more "fll'lly'described and later pointed out in the appended claim.

Figure' l Yrepresents an end view of an engine vboiler showing 'the furnace door opening and our attachment, Fig. 2 is an enlarged detail side elevation of the pivoted bar andA adjoining parts. Fig. 3 is a vertical 'sectional view through the bar and adjoining plate, the section being taken in the plane denoted by the line X X', Fig. 2. Fig.l 4 is an enlarged detail vertical sectional view through one of the valves. Fig. 5 4is an en larged detail horizontal sectional view througlithe furnace door, the section being taken in the plane denoted by the line Y Y', Fig. 1. Fig. 6 is an enlarged detail vertical sectional view through the door, the section being taken in the plane denoted by the line Z Z', Fig. 1.,

In the drawing vlike characters ot reference indicate corresponding parts in each ligure.

In the present instance we have shown the attachment as supplied to a railroad engine, but it is to be understood of course that it can be placed upon any engine with equal which has a neck 9 extending upwardly therefrom and pivoted at 10 to the end plate 3. The necks are provided with teeth 11 forming partial gear wheels, the teeth in'- termeshing so that the sections are forced open-or closed together. A flange 7 is prothree-way 'valves vided upon the section 6, which flange over-v laps the section 8 4when the door is closed. Lugs 12 extend downwardly from the sections and are received by a more or less Z- shaped bar 13 carried by the end of the boiler. This bar forms a guide for the door sections as is readily understood.

. 14 represents a cylinder located in any convenient position, which cylinder is provided with a piston 15 from whichextends a piston rod 16,` the rod being connected through a link 1'7 with an arm 18 passing from the partial gear wheel cont-rolling the door section 8. y 19 is a stationary plate firmly secured to the under side of the cabin platform 4. The plate is provided with-two vertically alined openings 20 and 21, which openings receive the threaded ends of pipes 22 and 23, such pipes passing respectively tothe lopposite ends of the cylinder 14, Valves 2-'1 and 25 are located in the pipes, such valves being ot that type which are commonly called If reference be made to '.F ig. 4 wherein one of the valves is shown it will be seen that the valve is provided with a duct 26 passing diametrically across it and a further duct 27 which communicates with the latter duct. The arms 28 and 29 of the valve casing are continuous with the length of the pipe 2l, while the short arm 30 thereof extends to the side and allows steam pressure to be released from the cylinder as desired.

31 is a bar pivotally secured at 32 to the plate perfectly smooth so that the two make good contact. The bar carries a flexible tube 33 which is connected through suitable piping with the main reservoir A located beneath the boiler. The tube 33 isadapted to communicate with either one or the other of the pipes 22 or 23 depending on the position of the bar. The bar is retained in the position shown in the drawings by a spiral spring 34, so that the tube 33 makes connection with the pipe 23 thereby holding the door sections closed, the piston being forced to the right hand end of the cylinderby the pressure of the steam in the reservoir.

35 is a pin-extending through the cabin floor or platform and resting on the' upper edge of the bar 31. When the pin is depressed the bar is carried downwardly so that the tube 33 makes connection with the pipe 22. The steam in the right handend of the cylinder consequently escapes through the opening 20 and the piston i's forced over by the pressure of the steam-in the pipe 22.

i The door sections consequently operi. to eX- which is regularlyleft open all the time the fireman is throwing coal into the furnace.

With our invention the door'is only' open.

for the short time that itv is necessary to throw the coal and is-.not open during the time that the coal is being procured from the'tender', as it Willbe lunderstood each time the fireman is ready'to ,throw in the coal he steps'on the'pi'n 23 and the sections fly open.

Upon releasingl his .footrthe door 'sections close.4 Consequently lthere is no unnecessary loss of heat and further considerable timev is saved 'as it is unnecessary tot grasp the door with the hand to open and close it.

The valves 24 and 25' are provided so that rthe reservoir pressure can be turned off the cylinder at any time and the cylinder opened lto atmospheric pressure.r

What we claim as our invention is:

In combination with a furnace door of the type iliade in two sectioiis,'a1id constructed to 'simultaneously swing toward or- 'away from each other, of' means for automatically cont-rolling'v and operating saine, consisting of a suitably located cylinderv joining said extending piston rod With one of the door sections, a suitably located'reservoir, a stationary plate provided with a set of' vertically aliiied opeiiiiigs, a. set'ot` 35` 'haring an extending piston rod, an arm pipes passiiig'from the openings to the cpposite ends of the cylinder, a spring pressed bar pvotally4 secured' to they-plate and. provided with an opening adapted to. registerwith' either one of the aforesaid openings' depending onthe position ofthebar, a flexible tubevconnected to the bar and 'communieating With'the opening, said tiibepassing t0 tlie'rese'rvoir, and a foot push-'purengageable with the bar yfor depressing the .Y

same, 'and thus controlling the `opening and closing of the scribed.

Manitoba, this 2nd daylof August, 1910.-

1 BERT GRANT. i

, CHARLES ERNEST In the presence of- VViLLiA-M DE MAXBEY,

THOMAS J.v BRANNEL.

doors, substantially as lde.`

Signed at Boissevaiii, in the'Pioviiice of'l 

